There is a tool so ordinary that almost nobody has considered how it works, and the answer turns out to be more particular than expected.
The obvious model is a…
Source: Wikipedia
There is a small piece of rural engineering that walkers cross constantly and rarely examine.
The problem it solves is truly awkward. A boundary must be continuous to hold…
Every terraced landscape is an enormous piece of engineering built by hand over generations, and every element of it answers a specific problem with a slope. Here are seventeen.
1.…
Prints deteriorate through several separate processes, some driven by light, some by chemistry and some by whatever they were stored in. Here are fifteen.
1. Colour Prints Are Made of…
There is a contradiction at the centre of making charcoal that explains everything about how it was done.
The wood has to be heated to a high temperature, and the…
There is an idea about sailing that seems obviously true and is only half the story.
The idea is that a sail is a bag that catches the wind and…